The 4th ACM SIGGRAPH Conference and Exhibition on Computer Graphics and Interactive Techniques in Asia
Conference 12-15 December • Exhibition 13-15 December • Hong Kong Convention & Exhibition Centre
 

Technical Papers

Light Transport

Thursday, 15 December 14:15 - 16:00 |  Convention Hall B

Session Chair
Kun Zhou

Modular Radiance Transfer - Picture

Modular Radiance Transfer


Modular Radiance Transfer (MRT) models coarse-scale, distant indirect lighting effects in scene geometry that scales from high-end graphics processing units (GPUs) to low-end mobile platforms. MRT eliminates scene-dependent precomputation by storing compact transport on simple shapes, akin to bounce cards used in film production.


Bradford J. Loos, University of Utah
Lakulish Antani, The University of North Carolina at Chapel Hill
Kenny Mitchell, Disney Interactive Studios
Derek Nowrouzezahrai, Disney Research Zurich
Wojciech Jarosz, Disney Research Zurich
Peter-Pike Sloan, Disney Interactive Studios


LightSlice: Matrix Slice Sampling for the Many-Lights Problem - Picture

LightSlice: Matrix Slice Sampling for the Many-Lights Problem


This paper presents LightSlice, an algorithm that efficiently solves the many-lights problem for large environments with complex lighting. Our algorithm effectively exploits both the global and local structure of the light transport matrix by clustering matrix columns independently for each slice (group of neighboring rows) of the matrix.


Jiawei Ou, Dartmouth College
Fabio Pellacini, Dartmouth College, Sapienza University of Rome


Practical Filtering for Efficient Ray-traced Directional Occlusion - Picture

Practical Filtering for Efficient Ray-traced Directional Occlusion


We give a frequency analysis of shadow light fields using distant illumination with a general bidirectional reflectance distribution function (BRDF), allowing us to share occlusion ray information even among complex receivers. We also present a new rotationally invariant filter that easily handles samples spread over a large angular domain.


Kevin Egan, Columbia University
Fredo Durand, MIT CSAIL
Ravi Ramamoorthi, University of California at Berkeley


Progressive Photon Beams - Picture

Progressive Photon Beams


We present progressive photon beams, a new consistent rendering algorithm capable of simulating extremely complex lighting in both homogeneous and heterogeneous media efficiently.


Wojciech Jarosz, Disney Research Zurich
Derek Nowrouzezahrai, Disney Research Zurich
Robert Thomas, Disney Research Zurich
Peter-Pike Sloan, Disney Interactive Studios
Matthias Zwicker, University of Bern